Palaeontologia africana
Permanent URI for this communityhttps://wiredspace.wits.ac.za/handle/10539/13253
ISSN (print): 0078-8554
ISSN (electronic): 2410-4418
For queries regarding content of Palaeontologia africana collections please contact Jonah Choiniere by email : jonah.choiniere@wits.ac.za or Tel : 011 717 6684
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Item Catalogue of fossil sites at the Buxton Limeworks, Taung(Bernard Price Institute for Palaeontological Research, 1994) McKee, Jeffrey KThe Buxton Limeworks, in the Taung district at the southeastern margin of the Kalahari Desert, harbours fossil deposits in the calcareous tufas spanning a time period from the late Pliocene to the present. Many such fossil sites, including the type site of Australopithecus africanus, have been exposed by quarrying and noted by various researchers since 1919. As many of the site locations have been lost in the past due to inadequate records and continued quarrying, an effort was made to relocate previously known sites and to discover new sites. There are now 17 preserved and recognized fossil sites in the Buxton Limeworks, the location and nature of which are documented here for future researchers.Item Taxonomic and evolutionary affinities of Papio izodi fossils from Taung and Sterkfontein(Bernard Price Institute for Palaeontological Research, 1993) McKee, Jeffrey KPapio izodi is an extinct papionin found at Taung and Sterkfontein. The taxonomic status of southern African fossils sometimes referred to P. izodi is clarified here in order to verify the existence of the species at Sterkfontein and define the morphological characteristics distinguishing it from P. angusticeps, a later species of similar size. P. izodi may be the earliest known species of the genus Papio in southern Africa, as the putative contemporary presence of the derived species Papio hamadryas robinsoni cannot be confirmed at Sterkfontein. P. izodi retains some of the primitive features found in Parapapio broomi, suggesting a close evolutionary link between the two species.Item Palaeo-ecology of the Sterkfontein hominids: a review and synthesis(Bernard Price Institute for Palaeontological Research, 1991) McKee, Jeffrey KExcavations at the Sterkfontein hominid fossil site have yielded a rich and revealing faunal assemblage. Evolutionary transitions are evident in early hominids and associated fauna between the times represented by Members 4 and 5. Member 4 has yielded a large and variable sample of Australopithecus africanus as well as evidence of considerable species diversity among the artiodactyls, carnivores and primates. The appearance of early Homo along with stone and bone tools in Member 5 coincides with a reduction of species representation in the orders of larger mammals as well as with the occurrence of new derived species and apparent extinctions. Three hypotheses have been suggested to account for the trends seen in the hominid-bearing members of the Sterkfontein Formation. The 'Climatic Change Hypothesis' accounts for the evolutionary trends by the causal factors of global and local cooling and aridification with evidence of savanna-grasslands supplanting an earlier environment with a denser cover of vegetation. The 'Taphonomic Hypothesis' explains changes in relative species representation at Sterkfontein in terms of the bone-accumulating agents; in Member 4 primary carnivores were largely responsible for the deposition of large mammalian fauna, whereas the scavenging activities of early Homo would have accounted for much of the bone and all of the artefacts found in Member 5. A third proposition is the 'Species Interaction Hypothesis', a derivative of the ' Red-Queen Hypothesis'; here the dynamics of species interaction, including competition and commensalism among hominids, carnivores and cercopithecids, propel the evolutionary changes and cause the extinctions. These hypotheses are not mutually exclusive, but the relative effects of the factors involved must be verified or refuted with better chronological controls and further analyses of the African fossil sites. The Sterkfontein Formation represents a microcosm in which various scenarios of African mammalian evolution can be tested.